Artificial Selection or “ Selective Breeding”. aka the process by which humans use animal breeding and plant breeding to selectively
The answer is c Ability to contract upon freezing
The reasons are:
- the blood is very low on nutrition
- the leech is not feeding itself regularly
The leech slows it metabolism a lot, so it can survive on very low nutrition. The blood is very low on nutrition, and it is the leech's food source, so the evolution made it preserve energy.
The leach doesn't have the opportunity to feed itself on regular basis, so it takes maximum advantage of any opportunity and consumes as much blood as possible so that it can survive long term when it will not have food at disposal.
The emu is the bird that lives on the south coast of australia
